Arrays Problems
Practice 47 Arrays coding problems on Code Arena — from easy to hard, each with a live judge and a solution editorial.
- Sort the Array — Easy · Sorting, Arrays
- Maximum Subarray Sum — Medium · Dynamic Programming, Arrays
- Array Sum — Easy · Arrays, Math
- Second Largest — Medium · Arrays
- Longest Increasing Subsequence — Hard · Dynamic Programming, Arrays
- Minimum of an Array — Easy · Arrays
- Count Even Numbers — Easy · Arrays
- Two Sum Exists — Medium · Arrays, Hashing
- Missing Number — Medium · Arrays, Math
- Kth Largest Element — Medium · Sorting, Arrays
- Most Frequent Element — Medium · Hashing, Arrays
- Maximum Product Subarray — Hard · Dynamic Programming, Arrays
- Two Sum — Easy · Arrays, Hashing
- Best Time to Buy and Sell Stock — Easy · Arrays, Dynamic Programming
- Contains Duplicate — Easy · Arrays, Hashing
- Move Zeroes — Easy · Arrays, Two Pointers
- Single Number — Medium · Bit Manipulation, Arrays
- Majority Element — Medium · Arrays, Algorithms
- Plus One — Easy · Arrays, Math
- Search Insert Position — Medium · Binary Search, Arrays
- Product of Array Except Self — Hard · Arrays, Prefix Sum
- Merge Two Sorted Arrays — Easy · Arrays, Sorting
- Shopping Cart Total — Easy · Arrays, Math
- Passing Students — Easy · Arrays
- Class Average — Easy · Arrays, Math
- Temperature Swing — Easy · Arrays
- Low Stock Alert — Easy · Arrays
- Transpose a Grid — Medium · Arrays, Implementation
- Grade Distribution — Medium · Arrays
- Account Balance — Easy · Arrays, Math
- Median Value — Medium · Sorting, Arrays
- Most Common Value — Medium · Arrays, Hashing
- Count Pairs with Sum — Medium · Arrays, Hashing
- Subarrays Summing to K — Hard · Arrays, Prefix Sum, Hashing
- Longest Equal Run — Medium · Arrays
- Rotate Array Right — Medium · Arrays, Implementation
- Heaviest Row — Medium · Matrix, Arrays
- Restock Alert — Easy · Arrays, Implementation
- Count Negatives — Easy · Arrays
- Array Range — Easy · Arrays
- Sum of Even Elements — Easy · Arrays, Math
- Running Maximum — Easy · Arrays
- Two Sum (Sorted) — Medium · Two Pointers, Arrays
- Maximum Window Sum — Medium · Sliding Window, Arrays
- Count Distinct (Sorted) — Medium · Two Pointers, Arrays
- Next Greater Element — Medium · Stack, Arrays
- Count Pairs With Difference — Medium · Hashing, Arrays